Trolley device for electric railways



(No Model) D. N. COOK.

' TROLLEY DEVICE FOR ELECTRIC RAILWAYS.

Patented May 19,1891.

rm: Nonms PETERS c D can be turned around the axis of said post UNITED STATES PATENT OFFICE.

DAVID N. COOK, OF SALEM, MASSACHUSETTS.

TROLLEY DEVICE FOR ELECTRIC RAILWA YS.

SPECIFICATION forming part of Letters Patent No. 452.542, dated May 19, 1891.

Application filed July 18,1890. v

To all whom it may concern.-

Be it known that I, DAVID N. COOK, a citizen of the United States, and a resident of Salem, in the county of Essex and State of Massachusetts, have invented new and usefulImprovementsin Trolley Devices, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in trolley devices for electric cars; and it is car ried out as follows, reference being had to the accompanying drawings, wherein Figure 1 represents a side elevation of the invention, parts of which are shown in section. Fig. 2 represents an end View of the same as seenfrom Xin Fig. 1. Fig.3 represents a central longitudinal section of the trolleyroller, and Fig. 4 represents a cross-section of the same on the'line YY, shown in Fig. 3. Fig. 5 represents a modification of the device, showing two rollers for wires arranged side by side; and Fig.6 represents a similar modification, showing two rollers for wires arrangbdjone above the other, according to the electric systems used for the propulsion of the cars.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

A represents the upper portion of a car, as usual, to which are secured the bracketsB O in a vertical perforation, in which the post D is journaled. The said post is secured to the horizontal-portion of the right-angled plate or bracket E.

e e are anti-friction balls or rollers located in annular grooves on the'under side of the bracket E and upper side of the bearing B or a plate secured to the top of the latter, as shown in Fig. 1. Similar anti-friction balls or rollers f are located in annular grooves on the under side of the bearing Gand upper side of the nut F, that is screwed onto the lower screw-threaded end of the post D, as shown in Fig. 1, and by the use of this antifriction-roller device the bracket E and post with a minimum of fractional resistance.

The upper end of the post D has an eye or ring D, adapted to receive the trolley arm or Serial No. 359,121. (No model.)

lever G, which is pivoted to such eye, preferably by means of suitable pins or screws d (l, as shown in Figs. 1 and 2.

On the inside of the vertical portion of the bracket E are cars and flanges E E, between which is guided the lower end of the trolley lever or arm G, as shown in Fig. 1. To the outside of the vertical portion of the bracket E is secured, preferably in an adjustable manner, a bracket H, and between the upper portion of the latter and the lower end of the trolley-arm Gis arranged a number of pressure-springs I I I for the purpose of holding the trolley roller or wheel K with a proper tension or pressure against the overhead wire L; If so desired, I may add another spring or springsi between the lower end of the arm G and horizontal portion of the bracket E, as shown in Fig. 1.

Any desired pressure may be exerted upon the lower end of the arm G by adjusting the bracket H relative to the bracket E, and for this purpose a number of perforations are made in said parts adapted to receive the fastening-bolts h h, as shown.

To the upper end of the arm G is secured or made in one piece with it a bearing-piece G, having an internal cylindrical bore g, in which is anti-frictionally journaled the trolley-spindle M, as shown in Fig. 1.

In the lower end of the cylindrical bore or recess 9 I locate a series of anti-friction balls or rollers g g, upon which rests the lower end of the spindle M, as shown.

G" is a screwthreaded cap or gland screwed into the upper end of the bearing-piece G, said cap havinga central perforation through which the spindle M passes freely. m is a flange or collar secured in a suitable manner to the spindle M, and between the upper side of the same and the under side of the cap G is located a series of anti-friction balls or rollers g g", as shown in Fig. 1. The trolleyroller K is loosely journaled on the pin or shaft 70, preferably secured in a suitable manner to the upper end. or forked portion of the spindle M. It will thus be seen that the trolley-spindle M is free to turn around its axis with a minimum of fractional resistance, by which arrangement the trolley-roller is free to adjust itself automatically relative to the wire L, which is of greatimportance, particularly when the car is driven around curves. For the purpose of preventing the trolleyroller from getting heated during its rapid revolution on its pin or bolt R, I make through its hub a series of longitudinal perforations k 70 and leading from the same a series of radial conduits 7;" 70", as shown in Figs. 3 and 4, by which arrangement afree circulation of air is caused through such perforated trolleyroller during its rapid revolution, thus preventing it from getting heated.

In practice I prefer to pivot or otherwise connect to the trolley-spindle M a rod or link V, depending from said spindle, as shown in Fig. 1, to enable the man in charge to take hold of when adj nstin g the trolley-roller relative to the wire L, by which arrangement valuable time is saved in connecting or disconnecting the trolley-roller to and from the said wire. The rod or link V may be provided with a cord '72, if so desired, as shown in Fig. 1.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent and claim- 1. In a trolley device, the combination, With the trolley-lever G, of the bearing-piece G, having in its upper end avertical cylindrical bore g, containing anti-friction balls or rollers g, the vertical axially-rotating trolleyspindle M,arranged in said bore, resting on the balls or rollers and provided with the rotating trolley-roller, and the cap G", engaging the bearing-piece and retaining the trolleyspindle in position, substantially as described.

2. In a trolley device, the stationary bearings B O and the vertical post D, journaled therein and having secured to it the bracket E, combined with the trolley-lever G, pivoted to the post D, the adjustable bracket II, and springs I I I, arranged between said bracket and upper side of the trolley-lever, substantially as and for the purpose set forth.

3. In a trolley device, the combination of the stationary bearings B and C, the post D, journaled in the brackets, the nut F, engaging the lower end of the post and provided with anti-friction balls or rollers fbetween it and the stationary bearings, the angularplate E, secured to the post above the bearings and provided with interposed anti-friction balls or rollers e, the trolley-lever G, pivoted to the post and having the trolley-roller K, and

springs connected with theangnlarplate and v trolley-lever, substantially as described.

4. A trolley-Wheel having a series of longitudinal and radial air-passages through its 11 nb portion, substantially as and for the pur' pose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 14th day of July, A. D. 1890.

DAVID N. COOK.

Witnesses:

ALBAN ANDREN, ALBERT F. J ONES. 

